The question about "bills" was already discussed... I don't mind if somebody thinks he should pay if there is the similar thing free. Get your free thing and see after some time if somebody will support it for you in the future. We are supporting miniBB and this is its most strong side of this project... and support can't be free. We can't work for free. And shame to you if you don't know there are no free things in this world, but if they come free, somebody already has paid for them. We run an independent project which is not paid on the annual basis by some company, so we need to get funds somewhere, and they come from selling some add-ons and our custom support.
Videos upload: I would tell this is an imperfect method to upload movies through a regular post form. Being professional and knowing how the web works, I will never support such thing.
Uploading videos are possible in miniBB other way... get File Bank add-on
with Uber Uploader, so you have possibility to upload unlimited size files with upload indicator in one place. Later, in your post you can provide a straight link to the file, so it opens with your default OS player - this is the way I ALWAYS like most, I hate when there is some stupid internal player forcing me to install kind of browser's plugin, which doesn't allow me to save the file, doesn't allow to make the height of the player wider etc. Or you can use some special BB code which will work with some kind of Flash player (like FlowPlayer for example) or other ActiveX control, and this code will place a player straight in the message.